Finally Leaving a Haram Friendship I’ve Been Stuck In

Assalamu alaikum, I’m honestly desperate for advice on how to walk away from this haram connection I’ve fallen into. I fully get that what I’m doing is wrong in Islam and I’ve tried ending it a bunch of times, but I keep slipping back. It’s been this long-distance thing for more than two years-we started out just chatting and playing a game together as friends. We’ve never called it a relationship or even said we’re more than friends, but it feels like we crossed that line a while ago. He’s not my husband or anything like that, we’ve never even met face-to-face, and I’ve avoided calls or video chats because I worry my family might overhear me talking to a guy. He’s Christian and I’m Muslim, and he doesn’t seem open to embracing Islam. I told him straight up that I could never marry a non-Muslim man, so deep down I feel like this has no real future. The thing is, I don’t know how to just stop. I keep thinking, what if ending it is a mistake, and maybe he’d convert if I stayed patient? I’m scared of hurting him and then dealing with a pain that feels like it’d break me. He’s become my closest companion, and I’m frightened I’ll lose that and never find a righteous spouse because of my choices. More than anything, I long to be approached in a halal way that pleases Allah, with clear intentions and boundaries. I’m tired of wasting moments on something that pulls me away from my deen. I need practical tips. Every time I try to cut contact, the silence aches so much I end up messaging him again, or he finds excuses to keep us tied. What do I even say to him? How do I stay firm on my word and finally break free for good?